Erythroxylaceae
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The best-known
species is the coca plant (Erythroxylum coca), the source of the
drug cocaine. Probably best known as a drug of abuse, cocaine is the oldest
known local anaesthetic.

Köhler’s magnum opus was published in parts from
1883-1898. The first volume was finished in 1887, eight years after his death.
The set of three volumes with 283 colour-plates was a noteworthy achievement and
included European plants of medicinal interest. From the botanical standpoint
the finest and most useful series of illustrations of medicinal plants (Great
flower books). The beautiful colour-plates after illustrations by Walther
Müller and C.F. Schmidt, which were skillfully rendered in lithography by E. Günther.
* Nissen BBI 1085; Great flower books p. 62; Stafleu & Cowan 3806.